Sales tax is one of those things that is “easy” to set up, but difficult to manage. Owners of peptide brands implement Shopify or Woo Commerce, turn on the tax collection feature, and assume the software handles it. Then they never think about it again.
That assumption is exactly how you end up with a five-figure bill from a state you didn’t know you owed anything to.
Sales tax for DTC peptide brands is one of the most misunderstood compliance obligations in the entire space. Not because the founders are careless but because the rules are confusing, they vary by state, and the specific product category you’re in makes everything harder than it would be for almost any other type of DTC brand. A company selling phone cases has it straightforward compared to peptides. You’re selling products that some states treat as food, some treat as drugs, some treat as general merchandise, and some have yet to decide what they are.
And the liability for getting it wrong doesn’t disappear. It sits there quietly accumulating interest and penalties until someone comes looking.
Let me explain.
The Rule That Changed Everything in 2018
Before 2018, the basic rule was simple. You only had to collect sales tax in states where you had a physical presence. A store, a warehouse, an employee. If none of those existed in a state, that state couldn’t make you collect their sales tax.
Then the Supreme Court decided South Dakota v. Wayfair, Inc. and the old rule was gone. The Court said that selling enough into a state creates what’s called economic nexus, which means the state can require you to collect and remit sales tax even if you’ve never set foot there. Every state that has a sales tax has now enacted economic nexus laws.
The dollar threshold that triggers nexus also varies state to state. Some states like California and Texas set it at $500,000, where Arizona sets the threshold at only $100,000.
So what does that mean for you? It means if you’re doing any real volume with a national DTC brand, you almost certainly have nexus in multiple states. And if you crossed the dollar threshold in a state during a prior year, you may have nexus there throughout the following year even if your sales drop back below the threshold.
Here’s the part that stings. Miss a threshold crossing and you’re looking at back taxes, penalties, and interest. The obligation doesn’t go away just because you didn’t know about it, and the window of leniency that some states offered right after Wayfair, where they’d waive penalties for late compliers, appears to have mostly closed.
Physical Nexus Is Still a Thing Too
One thing Wayfair didn’t do is eliminate physical nexus. It added economic nexus on top of it. So if you have a warehouse, fulfillment partner, employee, or contractor physically located in a state, you have nexus there from your very first sale, with no threshold required.
This catches a lot of founders off guard when they start working with a third-party logistics provider. If your 3PL is storing your inventory in a warehouse in Ohio, you have physical nexus in Ohio. Doesn’t matter if you’ve never sold a dollar to an Ohio customer. The inventory being there is enough.
Same thing applies to trade shows, in-person events, and pop-up sales. Even temporary physical presence can create nexus, and you may owe sales tax on everything you sold at that event plus ongoing obligations going forward.
Now Here’s Where Peptides Get Complicated
Everything above applies to any DTC brand. Here’s where your situation gets specifically hard.
Even once you know you have nexus in a state, you still have to figure out whether your product is actually taxable there. And for peptides, the answer changes state by state in ways that make little logical sense.
Americans buy more than 5.7 billion worth of vitamins and supplements every year. And across the country, states can’t agree on what those products even are. Some classify dietary supplements as food, drugs and general merchandise. While some have never issued a clear ruling and leave you to guess.
The result is a patchwork that requires product-by-product, state-by-state analysis. California generally taxes dietary supplements because they don’t meet the state’s definition of food. Texas exempts them when they carry a Supplement Facts label. New York exempts dietary foods and health supplements regardless of form. Connecticut, Florida and Michigan exempts them. Washington State explicitly taxes them. And Arkansas and Arizona don’t consider supplements food at all, so they’re taxable there too.
Surprisingly, the label on your product can be the deciding factor in some states. Some states base taxability entirely on whether the product displays a “Supplement Facts” panel versus a “Nutrition Facts” panel. That same product, with one label change, can flip from taxable to exempt or vice versa depending on the state. And if your product carries a “Drug Facts” panel, which some peptide and compounded wellness products do, that triggers an entirely different set of rules, with some states exempting prescription drugs but taxing OTC drugs and others doing the opposite.
If you’re selling subscription bundles that include a consultation alongside the product, it gets messier still. Some states tax the full transaction amount on a wellness bundle. Others require you to break out the product component and the service component and apply different tax treatment to each. If your checkout flow applies one blanket tax rate to everything, you’re almost certainly getting this wrong in at least a few states.
What Your Software Is and Isn’t Doing
Here’s the misconception I run into frequently: Founders assume that because they turned on Avalara, TaxJar, or Shopify’s built-in tax settings, they’re covered. And honestly, those tools are genuinely useful. But they’re not a substitute for someone who knows how to configure and validate them correctly for your specific product classification.
Compliance automation tools require you to correctly map your products to the right tax codes before the automation does anything useful. If you tagged your peptide products as general merchandise because that was the default, the software has been collecting tax on sales where you may owe nothing, and failing to collect in states where you do owe. The software doesn’t know your product is a dietary supplement. You have to tell it that, and then you have to tell it the right code for each state, because the code for “dietary supplement” in Texas is not the same as the code in California.
Getting your software configured wrong often means you’re either overcharging customers or underremitting to the state. Neither is a good outcome. Overcharging creates customer service issues and potential refund liability. Underremitting is the one that turns into an unexpected bill and potential bank levies.
What Happens When a State Comes Looking
Let’s say a state auditor pulls your sales records and finds you had nexus two years ago and weren’t collecting. Here’s how the math tends to work.
They’re going to calculate the tax you should have collected on every taxable transaction in their state going back to when you crossed the threshold. Then they’re going to add interest, which compounds monthly in most states. Then they’re going to add penalties, which in some states run 10% to 25% of the unpaid amount. By the time you get the bill, the number is almost always bigger than you’d expect because the interest and penalties have been accumulating quietly the whole time.
The good news is that most states offer what’s called a Voluntary Disclosure Agreement, or VDA. If you come forward proactively before they find you, a VDA typically limits the lookback period and significantly reduces or eliminates penalties. The sooner you act, the better the terms tend to be.
The Specific Mistakes I See Most Often
For DTC wellness brands, the most common problems I run into are these:
- Nexus mapping that was never done or done incorrectly. The founder launched, turned on Shopify tax settings, and assumed that was sufficient. Nobody ever sat down with a year of sales data and mapped which states they’d crossed the economic threshold in.
- Product taxability that was never analyzed. Even in states where nexus exists and taxes are collecting, nobody ever validated whether the product is actually taxable or exempt there. The founder is potentially collecting tax they don’t owe or missing an exemption from tax altogether.
- Subscription bundle taxation done incorrectly. This is especially common in the peptide space where the product comes bundled with a provider consultation or telehealth service. The service component is often taxed differently than the product, and most checkout flows don’t break it out.
- Physical nexus from a fulfillment partner that nobody thought to check. The brand grew, brought on a 3PL, and never ran a nexus analysis after the warehousing footprint changed.
The supplement market is only getting more complicated with new products being added all the time. Rules change at the state level frequently, and what was exempt last year may not be exempt this year. Without someone actively monitoring those changes and updating your product classifications, compliance erodes over time even if you set it up right at the start.
Where This Leaves You
The founders who handle this well aren’t necessarily the ones with the most sophisticated operations. They’re the ones who did a proper nexus analysis early, got their product taxability mapped correctly by someone who actually understands dietary supplements and peptides, configured their automation tools based on that analysis, and built a process for monitoring threshold crossings as sales grow.
If you’ve been running DTC for more than a year and haven’t done a full nexus review, there’s a real chance you have exposure sitting in a few states right now. Not because you were negligent. Because this is legitimately complicated, and nobody handed you a playbook when you launched.
The question isn’t whether you should get this sorted. It’s whether you’d rather deal with it on your terms or wait for a state to come find you first.
We help peptide brands get right at High Rock by providing nexus analysis, product taxability mapping, VDA support, and ongoing compliance monitoring. Reach out to our team today.
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